The short answer
There is no set interval. A well-fitted gutter that is cleared regularly can serve for decades, while a poorly fitted one can fail inside a few years. The better guide is condition: replace when joints keep leaking, sections have cracked or rusted, the run sags despite new brackets, or the fascia behind has rotted. A repair is cheaper while the problems are few and local.
Why there is no standard lifespan
Lifespans are published for roof coverings far more often than for gutters, so any single figure you meet for guttering is an estimate. Material, product quality, fitting and care all pull in different directions, which is why two gutters put up in the same year can be in very different shape.
The nearest published figure is for uPVC fascias, where a retailer says 20 to 40 years, and the retailer has a stake in the answer. It tells you nothing about gutters themselves, but it shows how wide the spread can be.
Material matters. Plastic suffers from sun, frost and the ageing of its seals. Cast iron can last a very long time if it is painted and cleared, and rusts through from the inside if it is not. Aluminium resists corrosion, though it dents. A gutter that holds water, because it was fitted with too little fall, wears out faster than one that drains.
Fitting is the biggest factor. A gutter set to the right fall, hung on enough strong brackets, fixed to sound timber and joined with good seals can outlast one that is simply thrown up. Care counts as well: leaves, moss and silt left to sit hold water and rot the metal or the joints.
Our page on aluminium against uPVC guttering compares what each material does as it ages.
Signs that replacement is due
Look for patterns, not single faults. One dripping joint is a repair. Several leaking joints along one run, joints that reopen after resealing and seals that have all perished at the same time point to a system at the end of its life.
Cracks and splits along the length of plastic, or rust holes and flaking in metal, mean the material itself is failing. Sections that have sprung from their clips, brackets that have pulled out of the fascia, and a run that sags between supports even after the brackets are renewed all suggest tired materials or rotten timber.
Overflow is another sign. If a gutter spills in normal rain despite being clear, it may have lost its fall, be too small, or have outlets that no longer suit the roof. The fall matters: Brett Martin's guide is 1 mm for every 600 mm, and BS EN 12056-3 covers roof drainage design. A gutter fixed to the wrong fall may need re-hanging or replacing.
Staining on the wall, damp patches, green growth, flaking paint on the fascia and a gutter pulled away at one end all show that water is not going where it should. Our page on damp walls from a leaking gutter describes the damage that follows.
The fascia's condition decides much of it. If the board is rotten, a new gutter on top would soon sag, so the board is dealt with first.
Repair first, where it will hold
A repair is the better buy while the faults are few and the material is sound. Resealing a joint, replacing a union or a short length, adding brackets and clearing a blocked outlet cost little compared with a new run, and can add years.
The test is whether the repair will last. A joint that has failed once and is otherwise good should hold when resealed properly. A run where every joint is weeping, and the plastic is brittle, will fail again somewhere else within months, and repeated visits cost more than one replacement.
Think about the whole roofline. If the gutter is old, the fascias and soffits are probably of similar age. Replacing them together shares the cost of access, and gives a roofline that works as a system. Our page on what decides the cost of a gutter repair explains how the figures build up.
MyJobQuote gives gutter replacement at around £1,000 to £1,600 (MyJobQuote, Oct 2026), a typical UK range, and £2,400 as the average for replacing concrete gutters on an older page dated January 2026. Which? (Nov 2025) puts emptying the gutters at £75 to £350, ex VAT.
Regular care is the least costly way to extend life. Clearing leaves and silt each autumn, and checking after storms, removes the commonest causes of early failure.
How we judge it on your house
We go along the whole roofline from the ground and from whatever access is set up, noting the material, the joints, the brackets, the falls, the outlets, the downpipes and the fascia behind. Photographs record each fault and its position.
From that we tell you which of three situations you are in: a sound gutter needing only clearing or a minor repair; a gutter with local faults that a repair will cure; or a worn-out run where replacement is the sensible course. The reasons come with the photographs beside them.
If replacement is right, we discuss the material and profile, the fall and outlets, and whether to renew the fascias and soffits at the same time. We confirm access, including any scaffold licence, and the total comes in writing with VAT stated.
Replacement is not recommended where repair will serve, and repair is not recommended where it would only postpone the bill. The answer is the one the survey supports.
The gutters, soffits and fascias hub covers everything along the eaves, and acting before water has reached the wall and fascia nearly always costs less.
